Update installation.md
Update installation.md

fix wording
Raganof/element,youngerheart/element,engriary/element,imyzf/element,hetian9288/elui,renxia/element,baiyaaaaa/element,ElemeFE/element,Leopoldthecoder/element-1,pengchongfu/element,hisland/element,ElemeFE/element,renxia/element,baiyaaaaa/element,jsyczhanghao/element,Kingwl/element,reverland/element,JavascriptTips/element,hisland/element,Kingwl/element,hetian9288/elui,reverland/element,karol-f/element,immissile/m-element,Leopoldthecoder/element-1,immissile/m-element,pengchongfu/element,JavascriptTips/element,engriary/element,Raganof/element,huguangju/element,iamnewsea/element-pzx,karol-f/element,iamnewsea/element-pzx,huguangju/element,imyzf/element,youngerheart/element